Haldex KN20021 PP-1 Push-Pull Parking Brake Valve
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
| Application | Fitment Notes |
|---|---|
| Compatible heavy-duty air-brake systems | Verify plumbing and pressure specifications before installation. |
Product Overview
This manually operated valve controls the parking/emergency brake circuit from the dash. Haldex lists KN20021 as a PP-1 style push-pull valve with 1/8-inch NPT ports.
Replace a valve that leaks, will not stay in position, or no longer controls the parking brake correctly. Air-brake repairs should be verified for system compatibility before installation.
Key Features & Performance
- PP-1 style push-pull parking brake valve
- Haldex reference KN20021
- Bulkhead dash mounting
- 1/8-inch NPT ports
Common Reasons for Replacement
- Air leakage from dash valve
- Valve will not hold or release properly
- Parking brake does not respond correctly to valve operation
Technical Specifications
- Part Type: Parking / Emergency Brake Dash Valve
- Ports: 1/8 in NPT
- Approx. Pop Pressure: 35 ±10 psi
- Mounting Hole: 7/8 in
OE / Reference Numbers
- KN20021
- H-30158
- N20960
- KN20903 (knob reference)
Frequently Asked Questions
How do I confirm compatibility? Confirm KN20021, port size, mounting and air-brake system configuration before ordering.
Is this an OEM part? This listing is for a replacement part. Brand names and OE/reference numbers are used to identify fitment unless the listing specifically states that the item is genuine OEM.